Wow public domain license! Smart move, I assume those disgruntled devs who "joined a project to explore the “future of tax filing” in the private sector" can now easily fork it and compete with TurboTax directly (with, I hope, a much better product at a lower price). Normally that'd feel a bit scummy but in this case I can't fault them for it.
Here's to hoping they can outcompete TurboTax so brutally that Intuit won't be able to pay for all those lobbyists anymore.